On the longest evenings of June the light along Bare Cove Park stays out on the water until nearly nine, and there is still good work to be done in it. Solstice Landscape Services Inc gives Hingham lawns the ordinary rhythm they need — weekly mowing, string-trimmed borders, beds edged and mulched, everything tidied before the gate closes. Grass on the old depot side of town runs sandy and wants seeding and feeding to stay thick; the shaded yards further inland ask for something else entirely. Spring and fall cleanups open and close the year around all of it. What lasts is the look of a lawn on a Friday evening, cut and quiet.